Regular expression - find match for string with Line breaks.

[sreemathy2000]

My requirement is to read/write a javascript file in a windows applications. this javascript file is used by my website..

function test
{
var a;
//start
dim obj ={'abc','bcd',' cde','def'};
//end
Some other code here
}

I reading the entire file and storing it in a string.
my requirement is to replace the below substring using regular expressions.
//start
dim obj ={'abc','bcd',' cde','def'};
//end

if its a string without line breaks i can use "//start.*//end", but since this string has a line break, please let me know what is the regex that i can use to find a match.

[Plater]

Regex in .NET has a switch/option that lets you match with newlines. Should be listed in MSDN.